Gas welding-tobch



` G. M. NEAGLEY.

Y GAS WELDING TORCH. APPLICATION FILED AUG. I?, 1915.

l l 9,?6. Patented Aug. 15, 1916.

cappa/7 05 517x155 UNTTED STATES PATENT buuren GUY MITCHELL NEAGILEY, OFCARBICK, PENNSYLVANIA.

GAS WELDING-TORCH.

Specification of Letters Patent.

Patented Aug. 15, 1916.

Substitute for application Serial No. 830,693, led April-9, 1914. This application led August 17, 1915.

' Serial 110.45.862.

To all whom t may concern:

, Be it known that I, GUY MITCHELL Nako- LEY a citizen of the United States, residing at arrick, in the county of Allegheng and State of Pennsylvania, have invente certain new and useful Improvements in Gas Welding-Torches' and I do declare the following to be a fuil, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, .which form a part of this specication.

My invention relates to improvements in v gas welding torches; and the objects of my invention are, first, to provide gas welding torches that are more simple in construction and design, the construction providing .an absolutely gas-tight joint in the mixing chamber; second, the injector tube and mixing chamber are primaril in the head, the inside of the welding tip orming an expansion chamber wherein the -gases are more homogeneously mixed before leaving the welding tip, lthereby producing more nearly perfect combustion, high eiciencyj and .better economy of gases. VI attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a longitudinal sectional view of the gas torch welding head assembly; Fi 2, a cross section taken at the line 2 2. imilar letters refer to similar parts throughout the several views.

To ut my invention into practice, I first provi e a body-portion or head A, preferably cylindrical in form and made of steel havin at its forward end an interna threa ed socket, a central longitudinal bore of varying diameters, that a', at the forward end being greater than the diameter a, at the rear; the body-portion fitted with two inlet tubes F G, communicating with the chambers a a'.

' member B having a central bore b, a tapering nozzle and an annular roove communieating with a mixing-cham er H, by means of longitudinally arranged ducts I, formed in the body of said injector tube. The weldin tip C, comprisesan annular body proyi ed with an internal 'mixin chamber H, into which the injector tube projects a short distance. A small duct la., leads forward from the mixing chamber I-I, to the weldingI tip proper, and has an annular flange at the rear; the external rear surface is slightly convex the better to contact with a soft metal washer E, intermediate of the head A, .and said' welding tip C. A union nut D, is now provided which engages with the threaded socket formed in the head A, and when screwed in lace serves to hold the parts of the torch rigidly together. The metal washer E, I prefer made of soft copper, but this washer may be made of brass or other suitable metal, having a greater coeiiicient of expansion than the head A, and at the same time resist a high temperature. This is also true with reference to the injector tube B, which I prefer to make of copper, brass or bronze, which metal having a greater expansion than the head A, when subjected to varying temperatures, will be more rigidly confined in its position and thereby effectually separate the two gases before their entrance into the mixing chamber H.

The peculiar construction and manner of connecting the welding tip C, with the head A, and the intermediate soft metal washer E, with its greater co-eiicient of expansion will form an absolute gas-tight joint, as is obvious.

It willbe noticed that the welding tip is formed without internal or external screw threads. 4This is a decided advantage, as the continuous or intermittent use of the tool will cause enlargement of such threads, loosening the connection thereby causing leakage of the ases.

Anot er advantage in this construction of a gas welding torch is in having a large mixing and expansion chamber in the welding tip, as the gases when mixed will be in c lose proximity to the exit of the welding tip proper.

I am aware that prior to my invention gas welding torches have been made of various constructions and designs, and I have found allfmakes of gas welding torches, coming within my observation and personal use to said tube being made of a metal having a leak after several months usage and regreater co-eiclent-of expansion than that of quent and'costly replacements necessary. the welding head, thereby eii'ectually sepa- 15 Having thus described my invention, I rating the gases before their mixing and 5 claim combustion. y

The combination with a gas torch Welding In testimony whereof, I aix my signature, head,ha wldirflg tip (izonnected therezo, a miin presence of two witnesses. in c am er orme in sai tip,a uct iea ing from said chamber to the point of said GUY MITCHELL NEAGLEY' 10 tip, and an intermediate concentric injector Witnesses:

tube pressed into said head and positioned M. E. HARRISON, to separate the one gas inlet from the other, Im` A. STURTEVANT. 

